CN219779786U - Active filtering cabinet - Google Patents
Active filtering cabinet Download PDFInfo
- Publication number
- CN219779786U CN219779786U CN202321345229.XU CN202321345229U CN219779786U CN 219779786 U CN219779786 U CN 219779786U CN 202321345229 U CN202321345229 U CN 202321345229U CN 219779786 U CN219779786 U CN 219779786U
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- cabinet body
- cabinet
- port
- connecting port
- inner cavity
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model discloses an active filter cabinet in the technical field of electric energy quality control equipment, which comprises: the cabinet body assembly comprises a cabinet body, a power port, a mutual inductor connecting port, a digital connecting port and a communication connecting port, wherein the power port, the mutual inductor connecting port, the digital connecting port and the communication connecting port are arranged at the end part of the cabinet body; the control mechanism is arranged in the inner cavity of the cabinet body and is electrically connected with the power port, the transformer connecting port, the digital connecting port and the communication connecting port respectively, and the control mechanism consists of a circuit breaker, a fast fuse, a soft starting resistor, a main contactor, a reactor, a filter capacitor, an IGBT power converter, a direct-current voltage sensor, a signal conditioning plate, an FPGA controller and an IGBT driving plate.
Description
Technical Field
The utility model relates to the technical field of power quality control equipment, in particular to an active filter cabinet.
Background
The impact load and the dispersion load existing in the public power grid in a considerable amount can be effectively solved by adopting a dynamic reactive power compensation method under the condition that the compensation effect of a commonly adopted centralized compensation mode is poor or the compensation is not carried out. Therefore, the outstanding problems of the current utility power grid power quality management are to effectively inhibit harmonic pollution and ensure reactive compensation and voltage stabilization.
The existing method is that an active filter APF and a static var generator SVG are connected to a power grid, harmonic wave treatment is carried out through the APF, dynamic reactive power, three-phase unbalance and low order harmonic wave compensation are carried out through the SVG, and operation is complex.
Disclosure of Invention
The utility model aims to provide an active filter cabinet, which solves the problems of complex operation caused by the prior method in the background technology that an active filter APF and a static var generator SVG are connected to a power grid, harmonic wave treatment is carried out through the APF, dynamic reactive power, three-phase unbalance and low-order harmonic wave compensation are carried out through the SVG.
In order to achieve the above purpose, the present utility model provides the following technical solutions: an active filter cabinet comprising:
the cabinet body assembly comprises a cabinet body, a power port, a mutual inductor connecting port, a digital connecting port and a communication connecting port, wherein the power port, the mutual inductor connecting port, the digital connecting port and the communication connecting port are arranged at the end part of the cabinet body;
the control mechanism is arranged in the inner cavity of the cabinet body and is respectively and electrically connected with the power port, the transformer connecting port, the digital connecting port and the communication connecting port, and the control mechanism consists of a circuit breaker, a fast fuse, a soft starting resistor, a main contactor, a reactor, a filter capacitor, an IGBT power converter, a direct-current voltage sensor, a signal conditioning plate, an FPGA controller and an IGBT driving plate.
Preferably, the cabinet body assembly further comprises an air outlet arranged at the end part of the cabinet body and a first installation frame arranged at one end of the inner cavity of the cabinet body away from the air outlet, and a fan is installed on one side, close to the air outlet, of the first installation frame.
Preferably, the cabinet further comprises a top cover, and the top cover is arranged at the top of the cabinet body.
Preferably, the air conditioner further comprises an end cover assembly, and the end cover assembly is arranged at one end, far away from the air outlet, of the cabinet body.
Preferably, the end cover assembly comprises an end cover arranged on the cabinet body and far away from one end of the air outlet, a net mouth arranged on the end cover and far away from one side of the cabinet body, and an air inlet arranged on the end cover and far away from one side of the cabinet body and communicated with the inner cavity of the cabinet body.
Preferably, the outer side wall of the cabinet body is embedded with a refrigerating sheet.
Preferably, the refrigerator further comprises a filter screen assembly, wherein the filter screen assembly comprises a second installation frame which is arranged in the inner cavity of the refrigerator body and is in contact with the refrigerating sheet, and a filter screen which is arranged on the inner side of the second installation frame.
Compared with the prior art, the utility model has the beneficial effects that: the active filter cabinet collects current signals in real time through external CT, sends the current signals to a signal conditioning circuit, and then sends the current signals to a controller. The controller separates the fundamental wave component, extracts all harmonic current, reactive current and three-phase unbalanced current, compares the collected current component to be compensated with the compensation current sent by the APF/SVG to obtain a difference value, outputs the difference value as a real-time compensation signal to the driving circuit, triggers the IGBT converter to inject the compensation current into the power grid to realize closed-loop control and complete the compensation function.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the assembly of the cabinet, top cover and end cap assembly of the present utility model;
FIG. 3 is a schematic diagram of a cabinet assembly according to the present utility model;
FIG. 4 is a schematic diagram of a control mechanism according to the present utility model;
FIG. 5 is a schematic view of the end cap assembly of the present utility model;
FIG. 6 is a schematic view of the mounting of the cabinet, refrigeration sheet and filter assembly of the present utility model;
fig. 7 is a schematic diagram of a filter assembly according to the present utility model.
In the figure: 100 cabinet assemblies, 110 cabinets, 111 refrigerating sheets, 120 power ports, 130 mutual inductor connecting ports, 140 digital connecting ports, 150 communication connecting ports, 160 air outlets, 170 mounting frames, 200 top covers, 300 end cover assemblies, 310 end covers, 320 net openings, 330 air inlets, 400 control mechanisms, 500 filter screen assemblies, 510 second mounting frames and 520 filter screens.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides an active filter cabinet, which is characterized in that an external CT (computed tomography) is used for collecting current signals in real time and sending the current signals to a signal conditioning circuit and then to a controller. The controller separates the fundamental wave component, extracts all harmonic current, reactive current and three-phase unbalanced current, compares the collected current component to be compensated with the compensation current sent by the APF/SVG to obtain a difference value, outputs the difference value as a real-time compensation signal to the driving circuit, triggers the IGBT converter to inject the compensation current into the power grid to realize closed-loop control and complete the compensation function, and can simultaneously carry out harmonic wave management and compensation of dynamic reactive power, three-phase unbalance and low-order harmonic wave without connecting a source filter and a static reactive generator on the power grid respectively, thereby having simple operation and improved working efficiency, referring to figures 1 and 3, comprising: a cabinet assembly 100 and a control mechanism 400;
referring to fig. 1-4, the cabinet assembly 100 includes a cabinet 110, a power port 120, a transformer connection port 130, a digital connection port 140 and a communication connection port 150 disposed at an end of the cabinet 110, a control mechanism 400 disposed in an inner cavity of the cabinet 110 and electrically connected to the power port 120, the transformer connection port 130, the digital connection port 140 and the communication connection port 150, the control mechanism 400 including a circuit breaker, a fast fuse, a soft start resistor, a main contactor, a reactor, a filter capacitor, an IGBT power converter, a dc voltage sensor, a signal conditioning board, an FPGA controller and an IGBT driving board, the power port 120 including five ports, two N-phase input ends, an a-phase input end, a B-phase input end and a C-phase input end, the N-phase input end including a three-phase four-wire neutral input end, the transformer connection port 130 including six ports, the CTC2 port, CTC1 port, CTB2 port, CTB1 port, CTA2 port and CTA1 port are respectively arranged from left to right, the CTC2 port is connected with the S2 end of the C phase CT, the CTC1 port is connected with the S1 end of the C phase CT, the CTB2 port is connected with the S2 end of the B phase CT, the CTA2 port is connected with the S2 end of the A phase CT, the CTA1 port is connected with the S1 end of the A phase CT, the CT transformer 150:5-2000:5, the secondary side rated current 5A is formed by 10 ports, the digital connection port 140 is respectively arranged from left to right as a CAP 2-port, a CAP2+ port, a CAP 1-port, a CAP1+ port, two standby ports, an EP02 port, an EP01 port, a 24V-port and a 24V+ port, the CAP 2-port is connected with the normal output end of the relay 2, the CAP 1-port is connected with the normal output end of the relay 2, the CAP1+ port is connected with the normal output end of the CAP1 output end, normally open contact, contact capacity of 250Vac/2A (cos phi=1), 30Vdc/1A, two spare ports respectively connected with negative digital input signal and positive digital input signal, EP02 port connected with negative digital input signal, EP01 port connected with positive digital input signal, optocoupler isolation input, voltage range: the communication connection port 150 is composed of 6 ports, namely a COM 1-port, a COM1+ port, a COM3-port, a COM3+ port, a CANH port and a CANL port from left to right, wherein the COM 1-port is connected with a 485 communication channel 3 signal B, the COM1+ port is connected with a 485 communication channel 3 signal A,9600 Baud rate, an external monitoring screen, the COM 3-port is connected with a 485 communication channel 2 signal B, the COM3+ port is connected with a 485 communication channel 2 signal A,9600 Baud rate, the CANH port is connected with a CAN communication interface signal H, the CANL port is connected with a CAN communication interface signal L, CAN communication is carried out, after the circuit breaker is switched on, in order to prevent instant impact of a power grid on a direct current bus capacitor during power-up, the APF/SVG charges the capacitor of the direct current bus through a soft-starting resistor firstly, the process CAN last for tens of seconds, when the bus voltage Udc reaches a preset value, the main contactor is closed, the direct-current capacitor is used as an energy storage device, compensation current is output outwards through the IGBT inverter and the internal reactor to provide energy, an APF/SVG acquires a current signal in real time through an external CT and sends the current signal to the signal conditioning circuit, then the signal conditioning circuit is sent to the controller, the controller separates fundamental wave components, extracts all harmonic current, reactive current and three-phase unbalanced current, compares the acquired current components to be compensated with the compensation current sent by the APF/SVG to obtain a difference value, and outputs the difference value as a real-time compensation signal to the driving circuit to trigger the IGBT converter to inject the compensation current into a power grid, thereby realizing closed-loop control, completing a compensation function and treating and reactive compensation on nonlinear load harmonic waves;
referring to fig. 1-5, the cabinet assembly 100 further includes an air outlet 160 disposed at an end of the cabinet 110, a first mounting frame 170 disposed at an end of the cavity of the cabinet 110 far from the air outlet 160, a fan mounted on a side of the first mounting frame 170 near the air outlet 160, a top cover 200 disposed at a top of the cabinet 110, an end cover assembly 300 disposed at an end of the cabinet 110 far from the air outlet 160, the end cover assembly 300 including an end cover 310 disposed at an end of the cabinet 110 far from the air outlet 160, a net opening 320 disposed at a side of the end cover 310 far from the cabinet 110, and an air inlet 330 disposed at a side of the end cover 310 far from the cabinet 110 and communicating with the cavity of the cabinet 110, in order to reduce a temperature of the cavity of the cabinet 110 and avoid damage to electrical components mounted in the cavity of the cabinet 110 due to high temperature, the top cover 200, the end cover assembly 300 and the air outlet 160 are further provided, the top cover 200 is detachably mounted at the top opening of the cabinet body 110 through bolts, the top cover 200 is in sealing treatment with the cabinet body 110, the end cover 310 is detachably mounted at the end opening of the cabinet body 110 through bolts, the end cover 310 is in sealing treatment with the cabinet body 110, the first mounting frame 170 and the cabinet body 110 are integrally processed, the fan is mounted in the inner cavity of the cabinet body 110, the fan is mounted on one side of the first mounting frame 170 facing the control mechanism 400, the air outlet 160 is communicated with the inner cavity of the cabinet body 110, the first filter screen is detachably mounted in the inner side of the air outlet 160 through bolts, the inner cavity of the air inlet 330 is communicated with the inner cavity of the cabinet body 110, the second filter screen is detachably mounted in the inner side of the air inlet 330 through bolts, the air inlet 330 corresponds to the fan, the outside air is pumped into the inner cavity of the cabinet body 110 through the fan, the outside air enters the inner cavity of the cabinet body 110 through the air inlet 330, the air conditioner is in heat exchange with high-temperature air in the inner cavity of the cabinet body 110, the inner cavity of the cabinet body 110 is cooled, the hot air in the inner cavity of the cabinet body 110 is discharged to the outside of the cabinet body 110 from the air outlet 160 under the drive of the fan, dust impurities in the air are filtered through the second filter screen when the outside air passes through the air inlet 330, the damage of electric elements caused by the dust impurities in the air is avoided, the first filter screen and the second filter screen are detachably mounted, the first filter screen and the second filter screen can be detached and cleaned after one end of use is carried out, the cooling effect of the inner cavity of the cabinet body 110 is prevented from being influenced by the deposition of the dust impurities, and the service life of equipment is ensured;
referring to fig. 1-2 and 6-7, the outer side wall of the cabinet 110 is inlaid with cooling sheets 111, the filter screen assembly 500 includes a second installation frame 510 disposed in the inner cavity of the cabinet 110 and contacting with the cooling sheets 111, and a filter screen 520 disposed in the inner side of the second installation frame 510, in order to further improve the heat dissipation effect of the inner cavity of the cabinet 110 and avoid damage to electrical components caused by low temperature, the utility model further provides cooling sheets 111 and filter screen assembly 500, the cooling sheets 111 are thermoelectric cooling sheets, the number of cooling sheets 111 is two, wherein the cold ends of the two cooling sheets 111 face the inner cavity of the cabinet 110, the hot ends are disposed in the outer side of the cabinet 110 and contact with the outside air, the hot ends of the other two cooling sheets 111 face the inner cavity of the cabinet 110, the cold ends are disposed in the outer side of the cabinet assembly 100 and contact with the outside air, the second installation frame 510 and the filter screen 520 are both made of high heat conductive materials, preferably copper or copper, the number of the second installation frames 510 is three, as shown in fig. 7, the filter screens 520 are arranged on the inner sides of the second installation frames 510, the mesh numbers of the filter screens 520 on the three second installation frames 510 are different, the mesh number of the filter screen 520 arranged on the inner cavity of the cabinet 110 towards the outer side is the smallest, the mesh number of the filter screen 520 arranged on the inner side of the cabinet 110 is the largest, dust impurities in air are filtered through three layers of the filter screens 520, dust impurities with different particle sizes can be filtered through the three layers of the filter screens 520, damage of the dust impurities to electric elements is further avoided, the second installation frames 510 are contacted with the refrigerating sheet 111, the refrigerating sheet 111 refrigerates or heats the second installation frames 510, the filter screen 520 is refrigerated or heated through the second installation frames 510, outside air enters the inner cavity of the cabinet body 110 under the drive of the fan, when the air passes through the filter screen 520, the air exchanges heat with the air through the filter screen 520, so that the air is cooled or heated, the temperature of the inner cavity of the cabinet body 110 is regulated through the cooled air or the heated air, in order to automatically regulate and control the temperature of the inner cavity of the cabinet body 110, a temperature sensor and a temperature controller are further arranged in the inner cavity of the cabinet body 110, the temperature sensor is electrically connected with the temperature controller, the temperature controller is electrically connected with the refrigerating sheet 111, when the refrigerator is particularly used, the temperature is firstly set to be between-10 and 40 ℃ through the threshold value of the temperature controller, the temperature of the inner cavity of the cabinet body 110 is monitored through the temperature sensor, when the temperature of the inner cavity of the cabinet body 110 is lower than-10 ℃, the temperature controller controls the hot end to start towards the refrigerating sheet 111 in the inner cavity of the cabinet body 110 to heat the filter screen 520, when external air enters into the inner cavity of the cabinet body 110 under the drive of the fan, the external air exchanges heat with the filter screen 520, the temperature of the inner cavity of the cabinet body 110 is raised by the air exchanged by heat, when the temperature of the inner cavity of the cabinet body 110 is higher than 40 ℃, the cold end can be controlled to start towards the refrigerating sheet 111 in the inner cavity of the cabinet body 110 by the temperature controller to refrigerate the filter screen 520, the air entering into the inner cavity of the cabinet body 110 exchanges heat with the filter screen 520, and the air cooled enters into the inner cavity of the cabinet body 110 to cool the inner cavity of the cabinet body 110, so that the temperature of the inner cavity of the cabinet body 110 is always kept between-10 ℃ and 40 ℃, and the service life of equipment is guaranteed.
Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner so long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of brevity and resource saving. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. An active filter cabinet which is characterized in that: comprising the following steps:
the cabinet body assembly (100), the cabinet body assembly (100) comprises a cabinet body (110), a power port (120) arranged at the end part of the cabinet body (110), a mutual inductor connecting port (130), a digital connecting port (140) and a communication connecting port (150);
the control mechanism (400), control mechanism (400) set up in the inner chamber of cabinet body (110) and respectively with power port (120), mutual-inductor connection port (130), digital connection port (140) with communication connection port (150) electric connection, control mechanism (400) is by circuit breaker, fast-acting fuse, soft play resistance, main contactor, reactor, filter capacitor, IGBT power converter, DC voltage sensor, signal conditioning board, FPGA controller and IGBT drive plate are constituteed.
2. An active filter cabinet according to claim 1, wherein: the cabinet body assembly (100) further comprises an air outlet (160) arranged at the end part of the cabinet body (110) and a first installation frame (170) arranged at one end, far away from the air outlet (160), of the inner cavity of the cabinet body (110), and a fan is installed on one side, close to the air outlet (160), of the first installation frame (170).
3. An active filter cabinet according to claim 2, wherein: the novel cabinet further comprises a top cover (200), and the top cover (200) is arranged at the top of the cabinet body (110).
4. An active filter cabinet according to claim 3, wherein: the end cover assembly (300) is arranged at one end, far away from the exhaust outlet (160), of the cabinet body (110).
5. An active filter cabinet according to claim 4, wherein: the end cover assembly (300) comprises an end cover (310) arranged on the cabinet body (110) and far away from one end of the air outlet (160), a net opening (320) arranged on the end cover (310) and far away from one side of the cabinet body (110), and an air inlet (330) arranged on the end cover (310) and far away from one side of the cabinet body (110) and communicated with the inner cavity of the cabinet body (110).
6. An active filter cabinet according to claim 5, wherein: the outer side wall of the cabinet body (110) is embedded with a refrigerating sheet (111).
7. An active filter cabinet according to claim 6, wherein: the refrigerator further comprises a filter screen assembly (500), wherein the filter screen assembly (500) comprises a second installation frame (510) which is arranged in the inner cavity of the refrigerator body (110) and is in contact with the refrigerating sheet (111), and a filter screen (520) which is arranged on the inner side of the second installation frame (510).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321345229.XU CN219779786U (en) | 2023-05-30 | 2023-05-30 | Active filtering cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321345229.XU CN219779786U (en) | 2023-05-30 | 2023-05-30 | Active filtering cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219779786U true CN219779786U (en) | 2023-09-29 |
Family
ID=88137815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321345229.XU Active CN219779786U (en) | 2023-05-30 | 2023-05-30 | Active filtering cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219779786U (en) |
-
2023
- 2023-05-30 CN CN202321345229.XU patent/CN219779786U/en active Active
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